chmod not working after accidentally deleting it's content

I was having a problem with setting permissions to a file, so I cd into /bin folder and with the command find chmod I found the file and it was empty so with a narration of a idiot in the internet, I replaced it with the command #!/bin/bash and after I tried to use the command it is not working.

So I think the solution will be to get the source code of chmod and replace with it ?!?!?!

or plz suggest me a solution I am unable to run any .sh files